US3882335A - Cooling apparatus for the rotor of an electric machine which uses a heat pipe - Google Patents

Cooling apparatus for the rotor of an electric machine which uses a heat pipe Download PDF

Info

Publication number
US3882335A
US3882335A US352270A US35227073A US3882335A US 3882335 A US3882335 A US 3882335A US 352270 A US352270 A US 352270A US 35227073 A US35227073 A US 35227073A US 3882335 A US3882335 A US 3882335A
Authority
US
United States
Prior art keywords
fan
heat pipe
vanes
hub
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US352270A
Other languages
English (en)
Inventor
Paul Fries
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Application granted granted Critical
Publication of US3882335A publication Critical patent/US3882335A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F28D15/04—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
    • H02K9/225—Heat pipes

Definitions

  • ABSTRACT An improved cooling apparatus for the rotor of an electric motor in which a hollow center portion'of the rotor has placed within it working fluid to cause the rotor to act as a heat pipe.
  • the improvement comprises a fan placed over the end of the rotor shaft.
  • the fan has a hollow portion in its hub which acts as an extension of the heat pipe thereby allowing the cooling vanes of the fan and the hub, which forms a part of inner heat pipe surface, to be made of one piece thereby allowing a more efficient heat transfer from the heat pipe to the cooling vanes.
  • the hollow shaft is made either entirely, or at least at its evaporator section, of a material which has good heat conductivity, e.g., copper. Copper, for example has a resistivity which is an order of magnitude smaller than that of steel which is normally used for manufacturing the hollow shaft.
  • a highly conductive material the heat-transfer from the condensation section of the hollow shaft to the outside environment can be materially improved.
  • German I Offenlegungsschrift 1,928,358 discloses attaching a fan to the hollow shaft in the condensation section.
  • Such a fan which will comprise a plurality of vanes mounted to a hub, is also preferably made of a highly heat conductive material.
  • the hub of this prior art fan has an opening ofa diameter such that it will tightly fit over the end of the shaft to permit heat to be transferred from the condensation portion through the fan and to the environment.
  • the fan will be cooled by air although other cooling mediums are possible.
  • the present invention provides a fan which efficiently and effectively serves all the above purposes. It provides very effective cooling of the heat pipe shaft in the rotor, and in addition provides cooling air to the cooling fins on the outside of the machine.
  • the invention resides primarily in forming the fan with a hollow portion in its hub which becomes an extension of the heat pipe in the rotor shaft. The portion of the heat pipe within the fan hub becomes the primary portion of the condensing section and heat is conducted directly to the vanes of the fan without having to pass through any air gap.
  • a hood is used to enclose the fan. This hood is fastened around the end bell of the machine.
  • the vanes are made with slopping edges and the hood similarly shaped to prevent having a sharp corner where stagnant air may form. If the full rectangular vane area available is required, trapezoidal, diametrically opposed guide baffles are inserted between at least two pairs of vanes to assure that the air stream is effectively directed out of the hood toward the cooling fins of the electric machine.
  • FIG. I A cross-sectional view of a first embodiment of the present invention installed in an electric machine is shown on FIG. I.
  • the rotor of the machine 3 is mounted to a shaft 2 which is supported for rotation in conventional manner.
  • the rotor 3 rotates within the stator 4 with a small air gap 5 between the rotor and the stator.
  • one end of the rotor shaft 2 is hollowed out to be used as a heat pipe.
  • the fan 10 of the present invention includes a hub 11 which has a section of larger inside diameter, sized to fit over the shaft 2 and a section of smaller inside diameter which is substantially equal to the inside diameter of the hollowed portion of rotor 2, to act as an extension of the heat pipe formed thereby.
  • the larger diameter section will preferably be threaded so that it may be screwed on to matching threads 12 on the end ofthe shaft 2.
  • a sealing ring 13, which may. for example. be made of a plastic material, is placed between the rotor shaft 2 and the fan to form a vacuum tight seal.
  • the outside end of the fan 10 contains a plug 14 which permits adding the working fluid to the rotor shaft under a vacuum.
  • the fan 10 is formed in a single piece of a highly conductive material and is made up of the hub portion 11 and a plurality of vanes A through 15F [In this particular embodiment six vanes are shown. However, the number of vanes may be varied as required] This fan construction may be more clearly seen from an observation of FIG. 2 which shows a cross-section of the fan along the lines lI--lI.
  • the plug 14 Prior to operation, the plug 14 is removed and a small amount of working fluid, which will normally be less than 10% of the interior space is added under a vacuum. The plug is then installed causing the working fluid to be sealed within the heat pipe under a vacuum.
  • the working fluid will formv a film 7 on the walls of the hollow portion.
  • the heat pipe may be thought of as generally having an evaporation section 8 and a condensation section 9. Heat from the rotor 3 will be transferred through the walls of the shaft 2 and will heat the working fluid causing it to evaporate, thus removing heat from the rotor. The evaporated working fluid will flow in the direction of the arrows to the condensation section 9 which will be at a lower pressure.
  • the hub 11 of the fan forms the major portion of the condensation section of the heat pipe, and because the hub 11 is made in a single piece with the vanes 15A through 15F, very effective heat transfer takes place.
  • the vanes 15A through 15F have outside edges which slope upwardly toward the machine.
  • the ventilator is surrounded by a fan hood 17 which is shaped to conform with the shape of the vanes. Hood 17 is attached to the outside case of the stator in conventional fashion.
  • the end of the hood 17 contains an entrance opening and has a portion adjacent thereto which is provided with a protective grill formed by making a plurality of holes 19 in the hood 17 in the area surrounding entrance opening 20.
  • the hood provides the dual function of providing protection i.e., both of providing protection for operating personnel and of protecting the ventilator from any foreign objects coming in contact with it as it rotates, and of providing a guiding surface for air flowing through the ventilator.
  • the hood 17 extends back over a portion of the stator. Air is drawn in through the entrance opening 20 and the grilled portion formed by the holes 19.
  • the shape of the vanes and of the hood causes this air to be directed over the outside of the stator 4 which will contain a plurality of cooling fms 24.
  • the fan is serving to both cool the rotor and to help in cooling the stator.
  • the slopping shape of the vanes assures that air cannot stagnate within the hood and thus very effective cooling results.
  • vanes constructed according to the embodiment of FIG. 3 may be used.
  • the vanes designated on FIG. 3 by the numbers 31A through 31F are of a rectangular shape.
  • the hub 32 is formed in the same manner as the hub 11 of FIGS. 1 and 2 to provide an extension of the heat pipe on its inside.
  • the vanes will be enclosed within a hood which is shaped substantially as the vanes themselves. This will result in a hood which has a square corner and stagnation of the air can result reducing the heat transfer. That is, there will be a smaller throughput of air and the rotor 3 and the fins 24 of the stator will not obtain the required cooling.
  • a plurality of baffles shaped as trapezoids are installed between the vanes. As shown on FIG.
  • baffle 33A between vanes 31A and 31B is a baffle 33A, between vanes 31B and31C, a baffle 33B, between vanes 31C and 31D, a baffle 33C, be-
  • baffles 33 insure that the air entering through the entrance opening 20 and the grill 19 is directed toward the cooling fins 24 on the stator and does not become stagnant in the corner of the ventilator hoods.
  • baffles 33 are shown between each two vanes, in most instances sufficient cooling will result if only a pair of baffles are installed diametrically opposed to each other. For example, only the baffles 33A and 33D would need be installed.
  • baffles nedd not extend over the entire width of the vanes 31. This arrangement will impart the required turbu- Iance to the air to cause it to be directed out of the ventilator hood and over the cooling fins 24. When an improved flow of air, the air temperatures as it leaves the ventilator and is directed over the cooling fins 24 will be lower and can provide more effective cooling.
  • Apparatus for improved cooling in an electric machine in which the rotor shaft is hollow and contains a small amount of working fluid so that it acts as a heat pipe comprising:
  • a fan having a plurality of essentially rectangular radial vanes, said fan having a hub shaped to fit over the end of the hollow shaft and said fan inclusive its vanes and its hub being formed in a single piece of highly conductive material and said hub having a hollow portion of a diameter equal to that of the hollow shaft to form an extension of the heat pipe, whereby the working fluid will be evaporated in the shaft portion of the heat pipe and will travel to the fan portion of the heat pipe where it will be condensed with heat being removed by the 'conduc'- tive effect of said hub and vanes and the air flowing thereover due to rotation of the fan,

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Motor Or Generator Cooling System (AREA)
US352270A 1972-04-25 1973-04-18 Cooling apparatus for the rotor of an electric machine which uses a heat pipe Expired - Lifetime US3882335A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2220266A DE2220266A1 (de) 1972-04-25 1972-04-25 Anordnung zur kuehlung des laeufers einer elektrischen maschine mittels eines waermerohrs

Publications (1)

Publication Number Publication Date
US3882335A true US3882335A (en) 1975-05-06

Family

ID=5843221

Family Applications (1)

Application Number Title Priority Date Filing Date
US352270A Expired - Lifetime US3882335A (en) 1972-04-25 1973-04-18 Cooling apparatus for the rotor of an electric machine which uses a heat pipe

Country Status (12)

Country Link
US (1) US3882335A (fr)
JP (1) JPS4947805A (fr)
BE (1) BE798592A (fr)
CA (1) CA968018A (fr)
CH (1) CH548130A (fr)
DE (1) DE2220266A1 (fr)
DK (1) DK131448B (fr)
FR (1) FR2182028A1 (fr)
GB (1) GB1367448A (fr)
IT (1) IT983982B (fr)
LU (1) LU67487A1 (fr)
NL (1) NL7304820A (fr)

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056748A (en) * 1975-10-06 1977-11-01 Carrier Corporation Magnetic speed pickup
US4101945A (en) * 1976-09-07 1978-07-18 Sycor, Inc. Drive spindle assembly for disc file
US4112663A (en) * 1976-07-06 1978-09-12 Vyzkumny Ustav Bavlnarsky Method of and apparatus for cooling spinning units of open-end spinning machines
US4118646A (en) * 1975-07-29 1978-10-03 Markon Engineering Company Limited Electromagnetic machines
US4137472A (en) * 1974-01-31 1979-01-30 S.B.W. Engineers Limited Cooling system for electric motors
FR2409627A1 (fr) * 1977-11-17 1979-06-15 Fujitsu Fanuc Ltd Machine electrique tournante a canal de refroidissement
EP0039493A2 (fr) * 1980-05-07 1981-11-11 Fanuc Ltd. Moteur électrique rotatif
US4438636A (en) * 1982-06-21 1984-03-27 Thermo Electron Corporation Heat-actuated air conditioner/heat pump
US5861688A (en) * 1993-12-15 1999-01-19 Siemens Aktiengesellschaft Drive unit having a pot-shaped drum
US6472782B1 (en) * 1999-06-30 2002-10-29 H.S.D. S.R.L. Drive spindle with two-stage static deflector
US20020164277A1 (en) * 2001-05-02 2002-11-07 Tobias Lee A. Phase change heat sink for use in electrical solenoids and motors
US20040196632A1 (en) * 2003-04-01 2004-10-07 Chin-Ming Chen Heat dissipation module
US20090104053A1 (en) * 2004-04-19 2009-04-23 Hewlett-Packard Development Company, L.P. Fan Unit and Methods of Forming Same
WO2010025989A1 (fr) 2008-09-08 2010-03-11 Siemens Aktiengesellschaft Pompe
US20100163213A1 (en) * 2008-12-25 2010-07-01 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Active heat sink for use with electronic device
US20100283335A1 (en) * 2009-05-05 2010-11-11 General Electric Company Generator coil cooling baffles
US20110018373A1 (en) * 2008-04-03 2011-01-27 Yu Tian Brushless DC Motor and a Radiator Thereof
US20110156520A1 (en) * 2009-12-25 2011-06-30 Mai Sheng-En Heat dissipation system and fan thereof
CN102340199A (zh) * 2010-07-01 2012-02-01 六逸科技股份有限公司 具有热管的马达
US20120180992A1 (en) * 2010-08-13 2012-07-19 Koplow Jeffrey P Axial flow heat exchanger devices and methods for heat transfer using axial flow devices
EP2608365A1 (fr) * 2011-12-22 2013-06-26 Joy Ride Technology Co., Ltd. Moteur électrique doté de caloducs
US20150069861A1 (en) * 2011-07-07 2015-03-12 Siemens Aktiengesellschaft Electric machine with rotor interior ventilation
US9416877B2 (en) 2009-06-12 2016-08-16 Alfa Laval Corporate Ab Cooling device for spindle sealing and/or bearing means
EP2551528A3 (fr) * 2011-07-26 2017-10-18 Hamilton Sundstrand Corporation Moteur avec rotor refroidi
CN107356143A (zh) * 2017-06-26 2017-11-17 上海嘉熙科技有限公司 热超导散热组件及具有热超导散热组件的电动机
US20170363004A1 (en) * 2016-06-20 2017-12-21 United Technologies Corporation Combustor component having enhanced cooling
CN107769417A (zh) * 2016-08-17 2018-03-06 罗伯特·博世有限公司 电动机
US11071294B1 (en) * 2017-11-14 2021-07-27 Dalen Products, Inc. Low power inflatable device

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6110458Y2 (fr) * 1977-06-22 1986-04-03
DE3102333C2 (de) * 1981-01-24 1985-05-30 Wilhelm Gebhardt Gmbh, 7112 Waldenburg Außenläufermotor
DE3405297A1 (de) * 1984-02-15 1985-09-05 Anton Piller GmbH & Co KG, 3360 Osterode Drehende maschine mit waermerohr-kuehlung
US4971142A (en) * 1989-01-03 1990-11-20 The Air Preheater Company, Inc. Heat exchanger and heat pipe therefor
US20070286744A1 (en) * 2006-06-12 2007-12-13 Marc Scott Hodes Fan apparatus and electrical equipment including such apparatus
DE102007043656A1 (de) * 2007-09-13 2009-05-07 Siemens Ag Elektrische Maschine
JP6376978B2 (ja) * 2014-01-10 2018-08-22 住友重機械工業株式会社 ギヤモータ

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US727686A (en) * 1902-01-18 1903-05-12 Gen Electric Means for cooling dynamo-electric machines.
US1877904A (en) * 1929-08-14 1932-09-20 Westinghouse Electric & Mfg Co Rotor ventilation for turbo generators
US2743384A (en) * 1953-05-12 1956-04-24 Singer Mfg Co Evaporative cooling systems for electric motors
US2772854A (en) * 1951-02-27 1956-12-04 Rateau Soc Vibration damping means for bladings of turbo-machines
US3213797A (en) * 1963-02-12 1965-10-26 Kenton D Mcmahan Centrifugal pumps
US3274410A (en) * 1962-12-21 1966-09-20 Electrolux Ab Cooling arrangement for motorfan unit
US3307775A (en) * 1964-09-04 1967-03-07 Rolls Royce Compressors for gas turbine jet propulsion engines
US3441757A (en) * 1967-08-07 1969-04-29 Preco Inc Cooling of dynamoelectric machines
US3449605A (en) * 1966-03-30 1969-06-10 Rotron Mfg Co Cooling arrangement for fanmotor combination
US3612718A (en) * 1968-12-16 1971-10-12 Rolls Royce Bladed member for a fluid flow machine

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US727686A (en) * 1902-01-18 1903-05-12 Gen Electric Means for cooling dynamo-electric machines.
US1877904A (en) * 1929-08-14 1932-09-20 Westinghouse Electric & Mfg Co Rotor ventilation for turbo generators
US2772854A (en) * 1951-02-27 1956-12-04 Rateau Soc Vibration damping means for bladings of turbo-machines
US2743384A (en) * 1953-05-12 1956-04-24 Singer Mfg Co Evaporative cooling systems for electric motors
US3274410A (en) * 1962-12-21 1966-09-20 Electrolux Ab Cooling arrangement for motorfan unit
US3213797A (en) * 1963-02-12 1965-10-26 Kenton D Mcmahan Centrifugal pumps
US3307775A (en) * 1964-09-04 1967-03-07 Rolls Royce Compressors for gas turbine jet propulsion engines
US3449605A (en) * 1966-03-30 1969-06-10 Rotron Mfg Co Cooling arrangement for fanmotor combination
US3441757A (en) * 1967-08-07 1969-04-29 Preco Inc Cooling of dynamoelectric machines
US3612718A (en) * 1968-12-16 1971-10-12 Rolls Royce Bladed member for a fluid flow machine

Cited By (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4137472A (en) * 1974-01-31 1979-01-30 S.B.W. Engineers Limited Cooling system for electric motors
US4118646A (en) * 1975-07-29 1978-10-03 Markon Engineering Company Limited Electromagnetic machines
US4056748A (en) * 1975-10-06 1977-11-01 Carrier Corporation Magnetic speed pickup
US4112663A (en) * 1976-07-06 1978-09-12 Vyzkumny Ustav Bavlnarsky Method of and apparatus for cooling spinning units of open-end spinning machines
US4101945A (en) * 1976-09-07 1978-07-18 Sycor, Inc. Drive spindle assembly for disc file
FR2409627A1 (fr) * 1977-11-17 1979-06-15 Fujitsu Fanuc Ltd Machine electrique tournante a canal de refroidissement
EP0039493A2 (fr) * 1980-05-07 1981-11-11 Fanuc Ltd. Moteur électrique rotatif
EP0039493A3 (en) * 1980-05-07 1982-06-09 Fanuc Ltd Rotary electric motor
US4438636A (en) * 1982-06-21 1984-03-27 Thermo Electron Corporation Heat-actuated air conditioner/heat pump
US5861688A (en) * 1993-12-15 1999-01-19 Siemens Aktiengesellschaft Drive unit having a pot-shaped drum
US6472782B1 (en) * 1999-06-30 2002-10-29 H.S.D. S.R.L. Drive spindle with two-stage static deflector
US20020164277A1 (en) * 2001-05-02 2002-11-07 Tobias Lee A. Phase change heat sink for use in electrical solenoids and motors
US7069979B2 (en) 2001-05-02 2006-07-04 Lockheed Martin Corporation Phase change heat sink for use in electrical solenoids and motors
EP1497850A2 (fr) * 2002-04-17 2005-01-19 Lockheed Martin Corporation Puits de chaleur a changement de phase destine aux solenoides et moteurs electriques
EP1497850A4 (fr) * 2002-04-17 2005-06-15 Lockheed Corp Puits de chaleur a changement de phase destine aux solenoides et moteurs electriques
US20040196632A1 (en) * 2003-04-01 2004-10-07 Chin-Ming Chen Heat dissipation module
US20090104053A1 (en) * 2004-04-19 2009-04-23 Hewlett-Packard Development Company, L.P. Fan Unit and Methods of Forming Same
US7855882B2 (en) * 2004-04-19 2010-12-21 Hewlett-Packard Development Company, L.P. Fan unit and methods of forming same
US8395289B2 (en) * 2008-04-03 2013-03-12 Yu Tian Brushless DC motor and a radiator thereof
US20110018373A1 (en) * 2008-04-03 2011-01-27 Yu Tian Brushless DC Motor and a Radiator Thereof
WO2010025989A1 (fr) 2008-09-08 2010-03-11 Siemens Aktiengesellschaft Pompe
CN102149924A (zh) * 2008-09-08 2011-08-10 西门子公司 泵
US20110164997A1 (en) * 2008-09-08 2011-07-07 Siemens Aktiengesellschaft Pump
US20100163213A1 (en) * 2008-12-25 2010-07-01 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Active heat sink for use with electronic device
US8365810B2 (en) * 2008-12-25 2013-02-05 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Active heat sink for use with electronic device
US7893576B2 (en) 2009-05-05 2011-02-22 General Electric Company Generator coil cooling baffles
US20100283335A1 (en) * 2009-05-05 2010-11-11 General Electric Company Generator coil cooling baffles
US9416877B2 (en) 2009-06-12 2016-08-16 Alfa Laval Corporate Ab Cooling device for spindle sealing and/or bearing means
US20110156520A1 (en) * 2009-12-25 2011-06-30 Mai Sheng-En Heat dissipation system and fan thereof
US8531073B2 (en) * 2009-12-25 2013-09-10 Delta Electronics, Inc. Heat dissipation system and fan thereof
CN102340199A (zh) * 2010-07-01 2012-02-01 六逸科技股份有限公司 具有热管的马达
US20120180992A1 (en) * 2010-08-13 2012-07-19 Koplow Jeffrey P Axial flow heat exchanger devices and methods for heat transfer using axial flow devices
US9261100B2 (en) * 2010-08-13 2016-02-16 Sandia Corporation Axial flow heat exchanger devices and methods for heat transfer using axial flow devices
US20160116232A1 (en) * 2011-03-02 2016-04-28 Sandia Corporation Axial flow heat exchanger devices and methods for heat transfer using axial flow devices
US10132574B2 (en) * 2011-03-02 2018-11-20 National Technology & Engineering Solutions Of Sandia, Llc Axial flow heat exchanger devices and methods for heat transfer using axial flow devices
RU2587543C2 (ru) * 2011-07-07 2016-06-20 Сименс Акциенгезелльшафт Электрическая машина с внутренней вентиляцией ротора
US9257883B2 (en) * 2011-07-07 2016-02-09 Siemens Aktiengesellschaft Electric machine with rotor interior ventilation
US20150069861A1 (en) * 2011-07-07 2015-03-12 Siemens Aktiengesellschaft Electric machine with rotor interior ventilation
EP2551528A3 (fr) * 2011-07-26 2017-10-18 Hamilton Sundstrand Corporation Moteur avec rotor refroidi
EP2608365A1 (fr) * 2011-12-22 2013-06-26 Joy Ride Technology Co., Ltd. Moteur électrique doté de caloducs
US20170363004A1 (en) * 2016-06-20 2017-12-21 United Technologies Corporation Combustor component having enhanced cooling
US10458331B2 (en) * 2016-06-20 2019-10-29 United Technologies Corporation Fuel injector with heat pipe cooling
CN107769417A (zh) * 2016-08-17 2018-03-06 罗伯特·博世有限公司 电动机
CN107769417B (zh) * 2016-08-17 2021-03-05 罗伯特·博世有限公司 电动机
CN107356143A (zh) * 2017-06-26 2017-11-17 上海嘉熙科技有限公司 热超导散热组件及具有热超导散热组件的电动机
US11071294B1 (en) * 2017-11-14 2021-07-27 Dalen Products, Inc. Low power inflatable device

Also Published As

Publication number Publication date
DK131448B (da) 1975-07-14
CH548130A (de) 1974-04-11
IT983982B (it) 1974-11-11
FR2182028A1 (fr) 1973-12-07
GB1367448A (en) 1974-09-18
NL7304820A (fr) 1973-10-29
DE2220266A1 (de) 1973-11-08
LU67487A1 (fr) 1973-07-06
DK131448C (fr) 1975-12-08
JPS4947805A (fr) 1974-05-09
BE798592A (fr) 1973-08-16
CA968018A (en) 1975-05-20

Similar Documents

Publication Publication Date Title
US3882335A (en) Cooling apparatus for the rotor of an electric machine which uses a heat pipe
US1700840A (en) Heat-transfer means for closed rotating electrical machinery
US5223757A (en) Motor cooling using a liquid cooled rotor
US4051400A (en) End gas gap baffle structure for reverse flow cooled dynamoelectric machine
RU2332602C2 (ru) Уплотнительное устройство и вентиляционная система электрического генератора с уплотнительным устройством
ES415860A1 (es) Maquina electrica rotativa, teniendo rotor y estator refri-gerados por tubos de calor.
BRPI0716803A2 (pt) Máquina elétrica com um rotor internamente resfriado
US2394517A (en) Cooling means for dynamoelectric machines
US3518467A (en) Totally enclosed fan-cooled electric motor
TWM547784U (zh) 具有冷卻功能的電機
US2947892A (en) Ventilation of totally enclosed motors
US3207934A (en) Electric motor with improved cooling means
JPH0974716A (ja) 電動機のロータ冷却構造
US3075105A (en) Ventilating system for dynamoelectric machines
SU771807A1 (ru) Электрическа машина
US2494471A (en) Ventilating apparatus for dynamo-electric machines
JPS5563549A (en) Cooling device for rotary electric machine
US2909682A (en) Self-cleaning ventilating system for dynamoelectric machines
JPH06237554A (ja) バルブ水車発電機
US1794663A (en) Protecting and heat-radiating means for electric motors
SU639090A1 (ru) Электрическа машина с воздушным охлаждением
GB276433A (en) Improvements in and relating to the cooling and ventilation of dynamo electric machines
US1928416A (en) Electric motor
SI20172A (sl) Električni stroj s tekočinskim hlajenjem
US2303883A (en) Dynamoelectric machine